Mountain Equipment Glacier

The Glacier 450 is rated for 18°F, making it a solid choice for 3-season alpine use. It is designed to keep you comfortable in sub-zero conditions, though your personal warmth preference and sleeping pad insulation will play a significant role in your overall comfort.

The tapered shape is designed to minimize dead airspace, which helps your body heat warm the bag more efficiently. While this maximizes thermal performance, it does mean a snugger fit compared to rectangular bags, so it is best suited for those who prefer a streamlined, performance-oriented feel.

Yes. The bag uses a water-resistant DRILITE® LOFT™ outer shell with a PFAS-free DWR finish to shield the down from dampness. While this provides excellent protection in humid or snowy environments, it is still important to keep the bag dry whenever possible to maintain the loft of the 700-fill power down.

The EXL® stitching gently pulls the fabric inward to hug your body, eliminating cold spots caused by empty space inside the bag. This feature is particularly effective at boosting warmth without adding the weight of extra insulation.

It does. The bag includes a full-length Gemini zip baffle, which acts as an insulated barrier behind the zipper to prevent cold air from leaking in and warm air from escaping. Additionally, the magnetic Lode Lock™ closure at the top makes it easy to secure the draft collar quickly.

The Regular size fits users up to 67 inches tall, while the Long accommodates users up to 73 inches. If you are near the upper height limit, we recommend sizing up to ensure you have enough room to move without compressing the down at your feet or head.